Rainbow-electronics DS2715 Bedienungsanleitung PDF herunterladen (Seite 3)

DS2715: NiMH Cell Pack Charge Controller

3 of 12

AC ELECTRICAL CHARACTERISTICS

(4.5V £ V

DD

£ 16.5V, T

A

= 0°C to +70°C, unless otherwise noted.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

UVLO Debounce Time t

UVLO

10 µs

Current Sense

Comparator Propagation

Delay

t

COMP

(Note 7) 250 ns

Discharge Detect

Propagation Delay

t

DD

From detection of current

reversal

1 µs

Return To Normal

Function (Op-Amp or

Comparator Mode)

t

RNF

Time from reset of

discharge latch

1 µs

R

T

Timing Accuracy t

Rt

(Note 4) -10 +10 %

Internal Clock Accuracy t

BASE

-10 +10 %

ELECTRICAL CHARACTERISTICS: CHARGING

(4.5V £ V

DD

£ 16.5V, T

A

= 0°C to +70°C, unless otherwise noted.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Fast Charge Comparator

Threshold

V

FC

Fast charge -127 -121 -115 mV

Fast Charge Comparator

Hysteresis

V

HYS-FC

Fast charge -31 -28 -25 mV

Top-off and Pre-Charge

Comparator Threshold

V

TO

Top-off and pre-charge -38 -33 -28 mV

Top-off and Pre-Charge

Comparator Hysteresis

V

HYS-TO

Top-off and pre-charge -10 -8 -6 mV

Discharge Latch Reset

Threshold

V

DCHG-RST

-15 -10 -5 mV

Discharge Latch Set

Threshold

V

DCHG-SET

Reverse current through

sense resistor

5 10 15 mV

Low Battery Detect

Threshold

V

LB

From presence detect into

pre-charge

0.95 1.0 1.05 V

Cell Detect Threshold V

DET

1.50 1.55 1.60 V

No Cell Detect Threshold V

OPEN

1.60 1.65 1.70 V

Presence Detect

Threshold Hysteresis

V

HYS-PD

90 100 110 mV

2.88 2.92 2.96 V

Minimum Charge Temp V

THM-MIN

(Note 5, 6)

0 ºC

1.28 1.32 1.36 V

Maximum Charge Temp V

THM-MAX

(Note 5, 6)

45 ºC

1.12 1.16 1.20 V

Over Temp V

THM-STOP

(Note 5, 6)

50 ºC

dT/dt Detect T

TERM

0.425 0.5 0.575 ºC/min

dT/dt Blanking Time t

BLANK

3.85 4.3 4.75 Min

Fast Charge Timer

Range

t

FC

0.5 6 Hours

Top-Off to Fast Charge

Duration Ratio

1:2

1 2 3 4 5 6 7 8 ... 11 12

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